EAST COAST MARINE SHELLS 



23 



Family Ischnochltonldae 



GENUS ISCHNOCHITON Gray 1847 

 (SLENDER CHITONS) 



ISCHNOCHITON FLORIDANUS Pllsbry. Florida 

 slender Chiton. Shell elongated, narrow; 

 valves roughly arched, not keeled; whitish 

 or delicate green, mottled with olive or 

 gray; interior pink, blue, and white, or 

 rarely all white or rosy. Girdle delicate- 

 ly marbled with bluish and gray, clothed 

 with rounded scales. Length 41 mm. 



PI. 56, Fig. 5 



Southern Florida to Key West 



ISCHNOCHITON LIMACIFORMIS Sowerby. Shell 

 elongated and narrow elevated; buff, gray, 

 or greenish, occasionally blotched with 

 red; interior stained with bright pink and 

 blue-green; anterior valves with eleven 

 slits, central valves with one, posterior 

 valves nine slits; teeth sharp, eaves sol- 

 id and grayish. Length 35 mm. 



Lives under stones at low water. 



PI. 56, Fig. 9 



Florida Keys; West Indies 



ISCHNOCHITON PAPILLOSUS C. B. Adams. 

 Pimpled Chiton. The smallest of the Flor- 

 ida or West Indian Ischnochitons. It is 

 uniformly granulated, the lateral areas 

 very indistinctly defined; shell wide, 

 greenish, closely spotted with whitish and 

 black; girdle finely scaly, alternately 

 greenish and white. Length 7 mm. 



Dredged by the writer off the 

 Florida west coast, clinging to shell frag- 

 ments, in about 2 fathoms and near Cape 

 Romano . 



PI. 56, Fig. S 



Marco; No Name Key; Key West, 



Florida 



GENUS CHAETOPLEURA Shuttleworth 185S 



CHAETOPLEURA APICULATA Say. Bee Chiton. 

 Shell convex, subcarinated, grayish or 

 pale chestnut; three to four concentric 

 lines upon anterior valve and many ele- 

 vated distant dots arranged in regular 

 lines along edge; six following valves 

 with elevated point like beads which at- 

 tain greater height than the dorsal trian- 

 gles; posterior valve with dots similar to 

 dorsal triangles, a middle knob and the 



remainder with dots like those on ajiterior 

 valve. Length 1 inch. Range 3-12 fathoms. 



PI. 57, Fig. 6 



PI. 70, Fig. 10 



Vineyard Sound, Massachusetts to 



Florida 



GENUS CERATOZONA Dall 1882 



Valves strong, exposed; girdle 

 tough, bearing peculiar corneous spines 

 similar to itself and generally bunched at 

 sutures. 



CERATOZONA RUGOSA Sowerby. Wrinkled Chiton. 

 Shell oblong, back broadly arched; surface 

 green olive or slate on sides, central 

 areas whitish along middle; tail valve 

 with broad pink ray behind; interior blue- 

 green; girdle horny yellow, very tenacious, 

 wide, yellowish with long pointed spines, 

 most numerous around edge, slender flexible 

 beards scattered among spines. Length 40 mm. 



PI. 57, Fig. 1 



PI. 56, Fig. 4 



Jupiter Inlet, East Florida to West 



Indies 



Family Chltonidae 



GENUS CHITON Linng 1758 

 (COAT OF MAIL SHELLS) 



CHITON TUBERCULATUS Linn§. Swollen Chiton. 

 Color varying from light olive to dark 

 olive brown, sometimes unicolored but gen- 

 erally speckled on side areas and end 

 valves, often clouded on central areas; 

 some valves with dark stripe on the ridge. 

 Interior blue-green, very smooth; girdle 

 buff, white or light green, with patches of 

 blackish or dark green. Scales coarse, 

 convex, polished. Length 2.5-3.5 inches. 



PI. 56, Fig. 1 



Florida Keys to Texas; West Indies 



CHITON MARMORATUS Gmelin. Marbled Chiton. 

 Shell oval, rather high; surface smooth, 

 polished; color variable, usually greenish 

 or brown, with darker spots, streaks and 

 lines; interior blue-green, each valve of- 

 ten with darker posterior rays; anterior 

 valve with eleven to fourteen, central 

 valves one, posterior valve thirteen to 

 seventeen slits; eaves and slit-rays very 

 porous. Girdle touched with green and 



